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Gene expression profile of TCR Vdelta1 positive gammadelta T cells expressed CD161

ABSTRACT: To elucidate the difference between CD161-negative TCR Vdelta1 and CD161-positive TCR Vdelta1 cells, we performed GeneChip analysis of these two types of cells in peripheral blood mononuclear cells from healthy donors. Such analysis identified 192 genes that were expressed at two-fold or higher levels on CD161-positive TCR Vdelta1 cells than on CD161-negative TCR Vdelta1 cells. Expression of three genes (CCL3, CCL4 and CD161) from this signature was quantified in the same RNA samples by real-time PCR.

ORGANISM(S): Homo sapiens

PROVIDER: GSE43402 | GEO | 2014/01/09

SECONDARY ACCESSION(S): PRJNA187526

REPOSITORIES: GEO

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Gene expression profile of TCR Vdelta1 positive gammadelta T cells expressed CD161

Project description:To elucidate the difference between CD161-negative TCR Vdelta1 and CD161-positive TCR Vdelta1 cells, we performed GeneChip analysis of these two types of cells in peripheral blood mononuclear cells from healthy donors. Such analysis identified 192 genes that were expressed at two-fold or higher levels on CD161-positive TCR Vdelta1 cells than on CD161-negative TCR Vdelta1 cells. Expression of three genes (CCL3, CCL4 and CD161) from this signature was quantified in the same RNA samples by real-time PCR. CD161-negative and CD161-positive TCR Vdelta1cells of three healthy volunteers were isolated from freshly peripheral blood mononuclear cells.

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Project description:CD161 is a C-type lectin like receptor expressed on the majority of Natural Killer (NK) cells, however, the significance of CD161 expression on NK cells has not been comprehensively investigated. We used microarrays to compare gene expression between healthy human CD161+ and CD161- NK cells.

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Project description:Regulatory T cells (Treg) are a cornerstone of immune regulation. Recent evidence indicates that human Treg show plasticity in specific settings. A subpopulation of Treg expressing CD161, a marker associated with T helper (Th)17 cells, have T effector -like characteristics and are enriched at sites of autoimmune inflammation. Here we used RNAseq to confirm the effector-like signature of CD161+ Treg and demonstrated a shared transcriptional signature between CD161+ Treg and CD161+ conventional T cells (Tconv). Pathway analysis suggested that CD161+ T cells have a migratory phenotype, expressing high levels of CCR9 and integrin α4β7, markers associated with gut homing. In response to all-trans retinoic acid, CD161+ T cells expressed higher levels of CCR9 and integrin α4β7 than CD161- T cells. Our data suggest that blood CD161+ T cells may have adopted gut homing properties upon retinoic acid exposure. In contrast to their peripheral counterparts, CD161+ T cells from the site of autoimmune arthritis have a diminished gut homing phenotype and blunted response to retinoic acid. In health, the TCRβ repertoires of CD161+ and CD161- T cells showed limited overlap whereas there is clear overlap in T cell clones from synovial fluid of autoimmune arthritis patients. We therefore propose that CD161+ and CD161- T cells are largely distinct populations in the healthy immune system but that the inflamed site creates an environment where CD161 levels in T cells can be altered, potentially contributing to disease pathogenesis.

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